خيارات البحث
النتائج 71 - 80 من 208
DNA concentration as an estimate of sludge biomass
1971
Combined treatment of municipal kraft linerboard, and fiberboard manufacturing wastes
1971
Clark, Edward A.
Phosphorus removal by ferrous iron and lime
1971
Alvord, E. Thomas
Spent pickle liquor, as a source of ferric ion, was added to primary treatment facilities and found to be effective in removing more than 60% of the phosphorus contained in the sewage. When advanced means for more complete removal of the insolubilized phosphates are available, removals in excess of 90% are indicated. In addition, overall suspended solids removals averaged 61.5% and BOD and COD removals averaged 61.6 and 55.3 percent during a 23 month test period. Required iron dosage ranged from the theoretical minimum of 2.7 to a maximum of approximately 3.1 weights of ferrous iron per weight of phosphorus. The weight increase in sludge solids due to chemical precipitation of phosphorus was 100 lbs/million gallons/mg/liter of phosphorus in the influent. Total costs for treating a raw sewage containing 13 mg/l phosphorus are given.
اظهر المزيد [+] اقل [-]Aerobic digestion of organic waste sludge
1971
Graves, Quintin B.
Engineering methodology for river and stream reaeration
1971
Murro, Ronald P. | Yeaple, Donald S.
Ground water pollution in Arizona, California, Nevada and Utah
1971
Fuhriman, Dean K. | Barton, James R.
Design and operation of an information center on analytical methodology
1971
Little, Robert L. | Darby, Ralph L. | Dennis, Bernard K.
The report discusses the design and operation of a pilot analytical methodology information storage and retrieval system tailored to the needs of the Analytical Quality Control Laboratory (AQCL) and other segments of the National Analytical Methods Development Research Program (NAMDRP). All aspects of the system are presented.
اظهر المزيد [+] اقل [-]Neutradesulfating treatment process for acid mine drainage
1971
An investigation of techniques for removal of cyanide from electroplating wastes
1971
Biology and water pollution control
1971
Warren, Charles E. | Doudoroff, Peter
